What is buttermilk solids?

Buttermilk solids are the dried remnants of buttermilk, which is the liquid left after churning cream into butter. These solids contain proteins, fats, lactose, and minerals, giving them a slightly tangy flavor. They are often used in baking, cooking, and as a flavoring or thickening agent in various food products. Buttermilk solids can also be a source of nutritional benefits, including calcium and protein.